1. head-to-wind 
2. Close-hauled
3. When the boats become overlapped

 The other boat is coming from behind, hence has no rights to "stick her bow in" ? Rule 12 & 18 ? 

1. Blue passes head to wind  in the zone and completes the tack clear ahead of green 1 boat length from the mark (18.3)
2. After tacking, Blue is fetching the mark
3. Green subsequently becomes overlapped inside Blue  (18.3 applies)
4. As Blue bore off to round the mark, Green did not have sufficient room to round the mark: Contact with the mark occurred and minor contact between bow of Blue and lifeline and port hull of green at the position of Green's traveler.
5. There was no damage or injury resulting from the contact. 

1. It's good to get into the habit of writing your FF's and conclusions always in the past tense. You did put your decision in present tense, that's good practice too. 
2. We mentioned rule 11 in the conclusions which would not be exonerated for Blue. 
3. You do mention that Yellow becomes overlapped in your FF's, but how that overlap occurs is important. 
   1. In the drawing and video, it is Blue turning to leeward that I think causes the overlap. Therefore, Yellow become ROW not by her own actions and rule 15 doesn't apply to her.  
   2. Had Blue held a close-hauled course and Yellow overtook Blue from clear astern, then rule 15 would have applied to Yellow, but yellow would be exonerated if she broke 15 by 43.1(b). 
   3. However you want to call it, you'd want a FF that supports one or the other. 

1. which boats were required to keep clear and whether any failed to do so. 
2. which boats were required to give room (under rules 15, 16, or 19) and whether any failed to do so. 
3. which boats were required to give mark-room (under rule 18) or broke rule 18.3  and whether any failed to do so.
4. whether any boats that failed to keep clear or give room were entitled to mark-room and were sailing within that mark-room (which would lead to exoneration under rule 43.1(b)) 
5. whether any boats that failed to keep clear or give room or mark-room were compelled to break that rule by another boat breaking a rule (which would lead to exoneration under rule 43.1(a))  AND ONLY THEN, with respect to contact between boats 

• with respect to a boat not having right of way or not sailing within any room or mark-room to which she was entitled, whether it was reasonably possible for her to have avoided contact, in which case she broke rule 14 
• with respect to a boat having right of way or sailing within the room or mark-room to which she is entitled, whether it was reasonably possible for her, acting no sooner than it was clear that the other boat was not keeping clear or giving room or mark-room, to have avoided contact (rule 14 last sentence):  If it was not possible, she does not break 14 at all.  
• If it was possible, but there is no injury or damage she is exonerated by rule 43.1(c)." 

1. You do mention that Yellow becomes overlapped in your FF's, but how that overlap occurs is important. 

   1. In the drawing and video, it is Blue turning to leeward that I think causes the overlap. Therefore, Yellow become ROW not by her own actions and rule 15 doesn't apply to her.  

   2. Had Blue held a close-hauled course and Yellow overtook Blue from clear astern, then rule 15 would have applied to Yellow, but yellow would be exonerated if she broke 15 by 43.1(b). 

   3. However you want to call it, you'd want a FF that supports one or the other. 

• After reaching a close-hauled course, Blue continued to alter course to port while Yellow held her course.  Blue's stern became overlapped with windward of Yellow's bow when Yellow was 1BL from the mark.  Blue and Yellow were separated by 1 boat width.